Data Set Name: NIS_2023_CORE Number of Observations: 6743716 Total Record Length: 643 Total Number of Data Elements: 125 Created on 12/10/2025. Columns Description ======= =========== 1- 3 Database name 5- 8 Discharge year of data 10- 35 File name 37- 40 Data element number 42- 70 Data element name 72- 75 Starting column of data element in ASCII file 77- 80 Ending column of data element in ASCII file 82- 82 Non-zero number of digits after decimal point for numeric data element 84- 87 Data element type (Num=numeric; Char=character) 89-188 Data element label NIS 2023 NIS_2023_Core 1 HOSP_NIS 1 5 Num NIS hospital number NIS 2023 NIS_2023_Core 2 KEY_NIS 6 15 Num NIS record number NIS 2023 NIS_2023_Core 3 NIS_STRATUM 16 19 Num NIS hospital stratum NIS 2023 NIS_2023_Core 4 AGE 20 22 Num Age in years at admission NIS 2023 NIS_2023_Core 5 AGE_NEONATE 23 24 Num Neonatal age (first 28 days after birth) indicator NIS 2023 NIS_2023_Core 6 AMONTH 25 26 Num Admission month NIS 2023 NIS_2023_Core 7 AWEEKEND 27 28 Num Admission day is a weekend NIS 2023 NIS_2023_Core 8 DIED 29 30 Num Died during hospitalization NIS 2023 NIS_2023_Core 9 DISCWT 31 41 7 Num NIS discharge weight NIS 2023 NIS_2023_Core 10 DISPUNIFORM 42 43 Num Disposition of patient (uniform) NIS 2023 NIS_2023_Core 11 DQTR 44 45 Num Discharge quarter NIS 2023 NIS_2023_Core 12 DRG 46 48 Num DRG in effect on discharge date NIS 2023 NIS_2023_Core 13 DRGVER 49 50 Num DRG grouper version used on discharge date NIS 2023 NIS_2023_Core 14 DRG_NoPOA 51 53 Num DRG in use on discharge date, calculated without POA NIS 2023 NIS_2023_Core 15 ELECTIVE 54 55 Num Elective versus non-elective admission NIS 2023 NIS_2023_Core 16 FEMALE 56 57 Num Indicator of sex NIS 2023 NIS_2023_Core 17 HCUP_ED 58 60 Num HCUP Emergency Department service indicator NIS 2023 NIS_2023_Core 18 I10_BIRTH 61 63 Num ICD-10-CM Birth Indicator NIS 2023 NIS_2023_Core 19 I10_DELIVERY 64 66 Num ICD-10-CM Delivery Indicator NIS 2023 NIS_2023_Core 20 I10_DX1 67 73 Char ICD-10-CM Diagnosis 1 NIS 2023 NIS_2023_Core 21 I10_DX2 74 80 Char ICD-10-CM Diagnosis 2 NIS 2023 NIS_2023_Core 22 I10_DX3 81 87 Char ICD-10-CM Diagnosis 3 NIS 2023 NIS_2023_Core 23 I10_DX4 88 94 Char ICD-10-CM Diagnosis 4 NIS 2023 NIS_2023_Core 24 I10_DX5 95 101 Char ICD-10-CM Diagnosis 5 NIS 2023 NIS_2023_Core 25 I10_DX6 102 108 Char ICD-10-CM Diagnosis 6 NIS 2023 NIS_2023_Core 26 I10_DX7 109 115 Char ICD-10-CM Diagnosis 7 NIS 2023 NIS_2023_Core 27 I10_DX8 116 122 Char ICD-10-CM Diagnosis 8 NIS 2023 NIS_2023_Core 28 I10_DX9 123 129 Char ICD-10-CM Diagnosis 9 NIS 2023 NIS_2023_Core 29 I10_DX10 130 136 Char ICD-10-CM Diagnosis 10 NIS 2023 NIS_2023_Core 30 I10_DX11 137 143 Char ICD-10-CM Diagnosis 11 NIS 2023 NIS_2023_Core 31 I10_DX12 144 150 Char ICD-10-CM Diagnosis 12 NIS 2023 NIS_2023_Core 32 I10_DX13 151 157 Char ICD-10-CM Diagnosis 13 NIS 2023 NIS_2023_Core 33 I10_DX14 158 164 Char ICD-10-CM Diagnosis 14 NIS 2023 NIS_2023_Core 34 I10_DX15 165 171 Char ICD-10-CM Diagnosis 15 NIS 2023 NIS_2023_Core 35 I10_DX16 172 178 Char ICD-10-CM Diagnosis 16 NIS 2023 NIS_2023_Core 36 I10_DX17 179 185 Char ICD-10-CM Diagnosis 17 NIS 2023 NIS_2023_Core 37 I10_DX18 186 192 Char ICD-10-CM Diagnosis 18 NIS 2023 NIS_2023_Core 38 I10_DX19 193 199 Char ICD-10-CM Diagnosis 19 NIS 2023 NIS_2023_Core 39 I10_DX20 200 206 Char ICD-10-CM Diagnosis 20 NIS 2023 NIS_2023_Core 40 I10_DX21 207 213 Char ICD-10-CM Diagnosis 21 NIS 2023 NIS_2023_Core 41 I10_DX22 214 220 Char ICD-10-CM Diagnosis 22 NIS 2023 NIS_2023_Core 42 I10_DX23 221 227 Char ICD-10-CM Diagnosis 23 NIS 2023 NIS_2023_Core 43 I10_DX24 228 234 Char ICD-10-CM Diagnosis 24 NIS 2023 NIS_2023_Core 44 I10_DX25 235 241 Char ICD-10-CM Diagnosis 25 NIS 2023 NIS_2023_Core 45 I10_DX26 242 248 Char ICD-10-CM Diagnosis 26 NIS 2023 NIS_2023_Core 46 I10_DX27 249 255 Char ICD-10-CM Diagnosis 27 NIS 2023 NIS_2023_Core 47 I10_DX28 256 262 Char ICD-10-CM Diagnosis 28 NIS 2023 NIS_2023_Core 48 I10_DX29 263 269 Char ICD-10-CM Diagnosis 29 NIS 2023 NIS_2023_Core 49 I10_DX30 270 276 Char ICD-10-CM Diagnosis 30 NIS 2023 NIS_2023_Core 50 I10_DX31 277 283 Char ICD-10-CM Diagnosis 31 NIS 2023 NIS_2023_Core 51 I10_DX32 284 290 Char ICD-10-CM Diagnosis 32 NIS 2023 NIS_2023_Core 52 I10_DX33 291 297 Char ICD-10-CM Diagnosis 33 NIS 2023 NIS_2023_Core 53 I10_DX34 298 304 Char ICD-10-CM Diagnosis 34 NIS 2023 NIS_2023_Core 54 I10_DX35 305 311 Char ICD-10-CM Diagnosis 35 NIS 2023 NIS_2023_Core 55 I10_DX36 312 318 Char ICD-10-CM Diagnosis 36 NIS 2023 NIS_2023_Core 56 I10_DX37 319 325 Char ICD-10-CM Diagnosis 37 NIS 2023 NIS_2023_Core 57 I10_DX38 326 332 Char ICD-10-CM Diagnosis 38 NIS 2023 NIS_2023_Core 58 I10_DX39 333 339 Char ICD-10-CM Diagnosis 39 NIS 2023 NIS_2023_Core 59 I10_DX40 340 346 Char ICD-10-CM Diagnosis 40 NIS 2023 NIS_2023_Core 60 I10_INJURY 347 348 Num Injury ICD-10-CM diagnosis reported on record (1: First-listed injury; 2: Other than first-listed injury; 0: No injury) NIS 2023 NIS_2023_Core 61 I10_MULTINJURY 349 350 Num Multiple ICD-10-CM injuries reported on record NIS 2023 NIS_2023_Core 62 I10_NDX 351 352 Num ICD-10-CM Number of diagnoses on this record NIS 2023 NIS_2023_Core 63 I10_NPR 353 354 Num ICD-10-PCS Number of procedures on this record NIS 2023 NIS_2023_Core 64 I10_PR1 355 361 Char ICD-10-PCS Procedure 1 NIS 2023 NIS_2023_Core 65 I10_PR2 362 368 Char ICD-10-PCS Procedure 2 NIS 2023 NIS_2023_Core 66 I10_PR3 369 375 Char ICD-10-PCS Procedure 3 NIS 2023 NIS_2023_Core 67 I10_PR4 376 382 Char ICD-10-PCS Procedure 4 NIS 2023 NIS_2023_Core 68 I10_PR5 383 389 Char ICD-10-PCS Procedure 5 NIS 2023 NIS_2023_Core 69 I10_PR6 390 396 Char ICD-10-PCS Procedure 6 NIS 2023 NIS_2023_Core 70 I10_PR7 397 403 Char ICD-10-PCS Procedure 7 NIS 2023 NIS_2023_Core 71 I10_PR8 404 410 Char ICD-10-PCS Procedure 8 NIS 2023 NIS_2023_Core 72 I10_PR9 411 417 Char ICD-10-PCS Procedure 9 NIS 2023 NIS_2023_Core 73 I10_PR10 418 424 Char ICD-10-PCS Procedure 10 NIS 2023 NIS_2023_Core 74 I10_PR11 425 431 Char ICD-10-PCS Procedure 11 NIS 2023 NIS_2023_Core 75 I10_PR12 432 438 Char ICD-10-PCS Procedure 12 NIS 2023 NIS_2023_Core 76 I10_PR13 439 445 Char ICD-10-PCS Procedure 13 NIS 2023 NIS_2023_Core 77 I10_PR14 446 452 Char ICD-10-PCS Procedure 14 NIS 2023 NIS_2023_Core 78 I10_PR15 453 459 Char ICD-10-PCS Procedure 15 NIS 2023 NIS_2023_Core 79 I10_PR16 460 466 Char ICD-10-PCS Procedure 16 NIS 2023 NIS_2023_Core 80 I10_PR17 467 473 Char ICD-10-PCS Procedure 17 NIS 2023 NIS_2023_Core 81 I10_PR18 474 480 Char ICD-10-PCS Procedure 18 NIS 2023 NIS_2023_Core 82 I10_PR19 481 487 Char ICD-10-PCS Procedure 19 NIS 2023 NIS_2023_Core 83 I10_PR20 488 494 Char ICD-10-PCS Procedure 20 NIS 2023 NIS_2023_Core 84 I10_PR21 495 501 Char ICD-10-PCS Procedure 21 NIS 2023 NIS_2023_Core 85 I10_PR22 502 508 Char ICD-10-PCS Procedure 22 NIS 2023 NIS_2023_Core 86 I10_PR23 509 515 Char ICD-10-PCS Procedure 23 NIS 2023 NIS_2023_Core 87 I10_PR24 516 522 Char ICD-10-PCS Procedure 24 NIS 2023 NIS_2023_Core 88 I10_PR25 523 529 Char ICD-10-PCS Procedure 25 NIS 2023 NIS_2023_Core 89 I10_SERVICELINE 530 532 Num ICD-10-CM/PCS Hospital Service Line NIS 2023 NIS_2023_Core 90 LOS 533 537 Num Length of stay (cleaned) NIS 2023 NIS_2023_Core 91 MDC 538 539 Num MDC in effect on discharge date NIS 2023 NIS_2023_Core 92 MDC_NoPOA 540 541 Num MDC in use on discharge date, calculated without POA NIS 2023 NIS_2023_Core 93 PAY1 542 543 Num Primary expected payer (uniform) NIS 2023 NIS_2023_Core 94 PCLASS_ORPROC 544 545 Num Indicates operating room (major diagnostic or therapeutic) procedure on the record NIS 2023 NIS_2023_Core 95 PRDAY1 546 548 Num Number of days from admission to I10_PR1 NIS 2023 NIS_2023_Core 96 PRDAY2 549 551 Num Number of days from admission to I10_PR2 NIS 2023 NIS_2023_Core 97 PRDAY3 552 554 Num Number of days from admission to I10_PR3 NIS 2023 NIS_2023_Core 98 PRDAY4 555 557 Num Number of days from admission to I10_PR4 NIS 2023 NIS_2023_Core 99 PRDAY5 558 560 Num Number of days from admission to I10_PR5 NIS 2023 NIS_2023_Core 100 PRDAY6 561 563 Num Number of days from admission to I10_PR6 NIS 2023 NIS_2023_Core 101 PRDAY7 564 566 Num Number of days from admission to I10_PR7 NIS 2023 NIS_2023_Core 102 PRDAY8 567 569 Num Number of days from admission to I10_PR8 NIS 2023 NIS_2023_Core 103 PRDAY9 570 572 Num Number of days from admission to I10_PR9 NIS 2023 NIS_2023_Core 104 PRDAY10 573 575 Num Number of days from admission to I10_PR10 NIS 2023 NIS_2023_Core 105 PRDAY11 576 578 Num Number of days from admission to I10_PR11 NIS 2023 NIS_2023_Core 106 PRDAY12 579 581 Num Number of days from admission to I10_PR12 NIS 2023 NIS_2023_Core 107 PRDAY13 582 584 Num Number of days from admission to I10_PR13 NIS 2023 NIS_2023_Core 108 PRDAY14 585 587 Num Number of days from admission to I10_PR14 NIS 2023 NIS_2023_Core 109 PRDAY15 588 590 Num Number of days from admission to I10_PR15 NIS 2023 NIS_2023_Core 110 PRDAY16 591 593 Num Number of days from admission to I10_PR16 NIS 2023 NIS_2023_Core 111 PRDAY17 594 596 Num Number of days from admission to I10_PR17 NIS 2023 NIS_2023_Core 112 PRDAY18 597 599 Num Number of days from admission to I10_PR18 NIS 2023 NIS_2023_Core 113 PRDAY19 600 602 Num Number of days from admission to I10_PR19 NIS 2023 NIS_2023_Core 114 PRDAY20 603 605 Num Number of days from admission to I10_PR20 NIS 2023 NIS_2023_Core 115 PRDAY21 606 608 Num Number of days from admission to I10_PR21 NIS 2023 NIS_2023_Core 116 PRDAY22 609 611 Num Number of days from admission to I10_PR22 NIS 2023 NIS_2023_Core 117 PRDAY23 612 614 Num Number of days from admission to I10_PR23 NIS 2023 NIS_2023_Core 118 PRDAY24 615 617 Num Number of days from admission to I10_PR24 NIS 2023 NIS_2023_Core 119 PRDAY25 618 620 Num Number of days from admission to I10_PR25 NIS 2023 NIS_2023_Core 120 TRAN_IN 621 622 Num Transfer in indicator NIS 2023 NIS_2023_Core 121 TRAN_OUT 623 624 Num Transfer out indicator NIS 2023 NIS_2023_Core 122 YEAR 625 628 Num Calendar year NIS 2023 NIS_2023_Core 123 ZIPINC_QRTL 629 630 Num Median household income national quartile for patient ZIP Code NIS 2023 NIS_2023_Core 124 TOTCHG_2023 631 640 Num Total charges adjusted for national estimates NIS 2023 NIS_2023_Core 125 PL_NCHS2 641 643 Num Patient Location: NCHS Urban-Rural Code (collapsed)